dt-bindings: leds: qcom-lpg: Document PM8937 PWM compatible

The PM8937 PWM modules are compatible with the PM8916 PWM modules,
document the PM8937 PWM compatible as fallback for the PM8916 PWM.

Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250213-pm8937-pwm-v2-1-49ea59801a33@mainlining.org
Signed-off-by: Lee Jones <lee@kernel.org>

Author: barni2000

Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml

@@ -39,6 +39,10 @@ properties:
           - enum:
               - qcom,pm8550-pwm
           - const: qcom,pm8350c-pwm
+      - items:
+          - enum:
+              - qcom,pm8937-pwm
+          - const: qcom,pm8916-pwm
 
   "#pwm-cells":
     const: 2